さすが

「さすが」expresses the speaker's acknowledgment that something is as expected or evaluated positively, while also showing the speaker's impression, admiration, or approval of that event. In this sense, 「さすが」can take forms like さすが、さすがは、さすがだ、さすがに... Additionally, you may encounter 「さすが」used in conjunction with structures like 「だけに」、「だけのことはある」、or 「だけあって」.
In the form of さすがに, 「さすが」has another meaning: to acknowledge an event but still have conflicting emotions about it. In other words, the speaker cannot fully accept that event.
「さすが」is commonly used in spoken language.